Holster



FIG. 1 is a front perspective view of a new ornamental design for a holster.

FIG. 2 is a front view of FIG. 1.

FIG. 3 is a rear view of FIG. 1.

FIG. 4 is a top view of FIG. 1.

FIG. 5 is a bottom view of FIG. 1.

FIG. 6 is a right side view of FIG. 1; and,

FIG. 7 is a left side view of FIG. 1.

The broken lines in the drawing show portions of the holster that form no part of the claimed design. 

CLAIM I claim the ornamental design for a holster, as shown and described. 